package ranab.jar;

import java.util.Date;
import java.util.zip.ZipEntry;

/**
 * Compare two zip entries based on the file name.
 *
 * @author <a href="mailto:rana_b@yahoo.com">Rana Bhattacharyya</a>
 */
public 
class ZipModificationTimeComparator extends ZipComparator  {
	
	public int compare(Object o1, Object o2)  {
		if (!(o1 instanceof java.util.zip.ZipEntry && o1 instanceof java.util.zip.ZipEntry))  {
			throw new IllegalArgumentException("Not a ZipEntry object."); 
		}
		
		ZipEntry z1 = (ZipEntry)o1;
		ZipEntry z2 = (ZipEntry)o2;
		Date dt1 = new Date(z1.getTime());
		Date dt2 = new Date(z2.getTime());
		return dt1.compareTo(dt2);
	}
	
	public boolean equals(Object o1, Object o2)  {
		if (!(o1 instanceof java.util.zip.ZipEntry && o1 instanceof java.util.zip.ZipEntry))  {
			throw new IllegalArgumentException("Not a ZipEntry object."); 
		}
		
		ZipEntry z1 = (ZipEntry)o1;
		ZipEntry z2 = (ZipEntry)o2;
		return z1.getTime() == z2.getTime();
	}
	
	
	/**
	 * get header name
	 */
	 public String getHeaderName()  {
	 	return "Modification Time";
	 }
}